Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thanh phan » thanh pho, thanh san, thanh toan
than phan » toan phan, thanh pham, thanh nhan
hien anh » hien hanh, thien anh, dien anh
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien anh - canh ((tranh va) or (trinh va)) thong cong ((than phan) OR (thanh phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - canh ((tranh va) OR (trinh va)) thong cong ((than phan) OR (thanh phan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien anh - canh ((tranh va) or (trinh va)) thong cong ((than phan) OR (thanh phan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - canh ((tranh va) or (trinh va)) thong cong ((than phan) OR (thanh phan)) cau*.